I was horrible at science and math. I couldn't pass a test to save my life! I'm surprised that it didn't take me until I was 20 to graduate. That's why my role is so cool - Grissom is the complete opposite of me.

President John F. From 2000 to 2010 he played Dr.  ???
The Time of Your Life.

Gilbert "Gil" Grissom on the hit CBS series CSI: Crime Scene Investigation Richard Chance in the film To Live and Die in L. and as Will Graham in the film Manhunter. William Louis Petersen (born February 21 1953) is an American actor and producer best known for playing Dr.